Weighting device for drawing frames



Mar. 27, 1923.

G. F. ALBRECHT WEIGHTING DEVICE FOR DRAWING FRAMES Filed July 14, 1922 L. JM

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Patented Mar. 27, 1923.

UNITED STATES 1,449,929 PATENT OFFICE.

GEORGE F. ALBRECHT, OF XVOONSOCKET, RHODE ISLAND, ASSIGNOR TO WOONSOCKET MACHINE & PRESS C0., INC., 0F WOONSOCKET, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

WEIGHTING DEVICE FOR DRAWING FRAMES.

Application filed July 14,

To all whom t may concern.'

Be it known that l, GEORGE F, ALBRECHT, `a citizen of the United States, residing at lVoonsocket, in the county of Providence, State of Rhode Island, have invented a certain new and useful Improvement in Teighting Devices for Drawing Frames, of which the following is a specification, re t'- erence beingl had therein to the accompanying drawings.

T he invention has relation to the weighting devices by means of which rolls of drawing frames are caused to press firmly against other rolls or other coacting elez'nents upon which they rest, to ensure proper cooperation in holding, feeding, and drawing the slivers of fibrous material passing through the sets of rolls.

More particularly, the invention relates to the weight-hooks constituting elements of the said devices, and to the pieces connecting the weight-hooks with the rolls with which the weight-hooks, etc., are combined.

The general object of the invention is to produce weighting devices of improved construction facilitating application, or removal and replacement, of the respective weight-hooks whenever necessary, with the weight-lifting bars in place in the machine; and also to produce devices comprising simplified connections between a weight and the roll upon which it acts.

An lillustrative embodiment of the invention is shown in the drawings, in which latten- Fig. 1 shows in vertical section certain port-ions of a drawing frame containing such embodiment.

Fig. 2 is an edge yview of one of the weight hooks.

Referring to the drawings, y

The horizontal beam of the machine frame is indicated at 1, at 2 is one of the stands mounted on said beam, and at 3, 3, etc., are roll-bearing blocks mounted upon said stands and each formed with a vertical slot receiving journals of a bottom roll et and a companion top-roll 5, ar bearing 6 for the journal of the bottom roll being located at the bottom of t-he said slot. As thus far referred to, the parts are as usual.

At 7, 7, etc., are so-called wire hooks which are hung upon the journals of the top-rolls 5; at 8, 8, etc., are so-called weight-hooks 1922. Serial No. 575,104.

which are hung to the hooked lower ends of the wire hooks 7, 7, etc., and at 9, 9, etc., are' weights which are hung by means of their bails 91,' 91, etc., to t-he hooks 83, 83, etc., formed upon the lower ends of the weight-hooks. The general relations, and the effect of the weights in pressing the toprolls down upon the bottom rolls, are as usual. At lO, 10, etc., are lifter-bars of usual character extending transversely of the machine, and provided, for service in raising and supporting the weight-hooks and weights when it is desired to relieve the toprolls of the effect of the weights. The mode of engagement of the lifter-bars with the weight-hooks is explained hereinafter. The lifter-bars are shown as having combined therewith means for raising them, in the usual shape of a roll 11 mounted eccentrically in the machine frame under the lifterbars, the shaft 12 of the said eccentric. roll being journalled in bearings at 13, 13, in front and rear brackets 17, 17, connected with the said frame, and the extended front end-portion of the said shaft being' provided with a handle 14 by means of which the operator may turn the shaft and eccentric roll to raise the lifter-bars, weight-hooks, and

weights, to relieve the top-rolls from the.

action of the weights, as aforesaid; or to lower the lifter-bars, etc., to permit the weights to exert their effect upon the rolls again. As will be understood, the eccentric roll, etc., are duplicated at opposite sides of the machine, to enable the action in raising the lifter-bars to be applied at both ends of the said bars. At 15 is the usual retaining rod, extending loosely in the direction from front to rear through holes in the series of lifter-bars, and having its ends entered into vertical guideways 16, 16, in the brackets 17, 17. y The retaining rod moves up and down in the saidL guideways as the lifter-bars are raised and' lowered through rotation of the pair of eccentric rolls 11, and serves to prevent endwise shift of the lifter-bars.

` In usual practice heretofore, the weighthooks employed in drawing frames have been made, with closed slots to receive the lifterbars. A drawback in connection with .this construction is that, in assembling the parts of a drawing frame, the weightyhooks must all be introduced into place before the lifter-bars are put into their places;

hook is provided y 102 between such parts, usually termed wire hooks 7 7 etc.,

V8, 8, etc. .weight-hooks in a flexible manner in disassembling the parts, the lifter-bars must first be removed. This has its inconvenience in case a weight-hook should become broken, which happens occasionally through accident or through carelessness in applying a weight thereto, as in the process of assembling or in replacing the weight after removal thereof for so-me purpose. In order to effect the removal of a broken weight-hook havinga closed loop and the insertion of a new one, it is necessary first to withdraw from the machine the lifterbar passing through the slots of the row of weight-hooks containing the broken weight-hook, and after the broken weighthook has been replaced by a new one replace the lifter-bar. In effecting such replacement the lifter-bar has to be threaded through the slots of all the weight-hooks of such row in order to assemble the parts for further operation.l

In accordance with the invention, and in order to facilitate the insertion of weighthooks into their proper working relations in a drawing frame while the lifter-bars 10, 10, etc., are in place in the machine, and likewise in order to provide for removal of a broken weight-hook and insertion of a new one without withdrawal of the corresponding lifter-bar from its place,

I form each weight-hook with an open notch to loosely fit the top of the lifter-bar with which it is associated in use. The weightat one side of the said notch with an outstanding downwardly pointing finger 101, and with a shoulder finger and the lower portion 103 of the body of the hoo-k. The shoulder is adapted to be engaged by the lifter-bar with which the weight-hook is associated in use, vwhen such lifter-bar is raised, so that the lifter-bar shall raise the weight-hook with it. The downwardly ointing finger 101 extends alongside the llifter-bar so as to prevent relative displacement of the weight-hook and lifter-bar withrelation to each other. This construction enables a weight-hook to be placed in the drawing frame and placed in proper working relations with a lifter-bar already in the machine, and also enables a weighthook to be removed without it being necessary to withdraw the lifter-bar first. Substitution of a fresh weight-hook in case of breakage of one already in the drawing frame is facilitated.

It is customary to employ intermediate stirrups, between the and the weight-hooks Such stirrups serve to connect the with the wire hooks. In accordance with the invention I .dispense with stirrups, thereby reducing materially the number of separate parts, and I extendA the upper ends' ofthe weighthooks upward in the form of elongated stems, 81, 81, etc., and I engage the upper ends of the said stems directly with the lower ends of the wire hooks. The stems 81, 81, etc., work freely in holes through the horizontal web-portion of the beam 1 of the machine frame.

For the engagement of the upper ends of the stems 81, 81, etc., of the weight-hooks with the lower ends of the wire hooks 7, 7, etc., I form the upper end of a weight-hook stem 81 with an elongated slot S2, Fig. 2. The hook 71 at the lower end of a wire hook 7 is'engaged in this per end-wall of the slot rests in the bend of the said hooked lowerfend. One purpose in view in forming the upper end of the weight-hook stem with a vertically elongated slot, instead of with a round or other hole in which the wire hook closely fits, is

to facilitate the operation of engaging the weight-hook and wire hook with each other in the process of assembling the partsin the machine, and also facilitate the operation of disengaging the parts from each other. gagement between the hooked lower end of the wire hook and the edge of the opening through the weight-hook stem.

If the weight-hook stem were made with a small hole closely fitting the wire hook, it would be difficult to insert the hooked lower end of the wire hook into the hole after placing the parts in approximate position within the machine-frame, especially in case the free extremity of the said hooked lower end should be caused to project upward to the extent indicated in Fig. 1. This extent of upward projection is desired in order to safeguard against accidental disconnection of the weight-hook and wire hook from each other when the weight-hook and weight have been raised by means of the liftermeans.

When a weight-hook is raised by upward movement of the lifter-bar with which it is associated, swaying movement of its upper end and of the hooked lower end of t-he wire hook occurs. In the case of a hole in the upper end of the weight-hook closely fitting the hooked portion of the wire hook, such swaying would cause locking or cramping of such lower end in the hole. This would cause inconvenience in disengagin the weight-hook from the wire hook. /[oreover, it would be diflicult to disengage the weight-hook from the wire hook, in case the former had a small hole, and the lower end of the wire hook were upturned to the extent shown in Fig. 1 of the drawings. The usual conditions existing in the case of a drawing frame would necessitate the cooperation of two men in assembling or disassembling the parts in the machine. By having an elongated slot 82 in the upper end Another is to avoid cramping enllO - placed in working relations readily. They can be as readily disengaged from each other, because for the purpose of disengaging them it is necessary merely to raise the weight-hook vertically until the upper endwall of slot 82 is above the point of the hook 7l and then swing the weight-hook until `its stem has been carried out clear of t-he said point.

Removal of a weight-hook is accomplished, after preliminary raising of the se-v ries of lifter-bars and the assemblage of weight-hooks by means of the eccentric lifter-rolls. When the weight-hooks have been raised, the particular weight-hook which it is desired to remove may have its upper end disengaged from the corresponding Wire hook by swinging such upper end out of engagement with the hooked lower end of the said wire hook. Assuming the corresponding weightto have been detached from the lower end ofthe weight-hook, the open notch of the weight-hook may be lifted o' from the lifter-bar, and the weight-hook drawn out of the machine. The insertion of a weight-hook in the place of the one removed may likewise be effected in obvious manner with facility.

What is claimed as the invention is,-

1. In a drawing frame, the combination with drawing rolls, hooks suspended from the journals of the said rolls, weights, and weight-lifting bars, of weight-hooks each having an integral stem detachably engaging by its upper end with one of the hooks Ifirst mentioned, and also an open notch to fit removably over the corresponding lifting bar.

2. In a drawing frame, the combination with drawing rolls, hooks suspended from the journals of the said rolls, weights, and

weight-lifting bars, of weight-hooks each having an upwardly extending integral stem having a verticallyelongated slot `occupied by the hooked lower end of one of the hooks rst mentioned, and the lower portion of the hook having an open notch to fit removably over the corresponding lifting bar.

3. In a drawing frame, the combination with drawing rolls, weights, and weightlifting bars, of weight-hooks having open notches which removably t the said bars, upwardly extended integral stems having elongated slots in their upper portions, and wire hooks having their hooked lower ends engaged in the said slots and their hooked upper ends engaging with the roll journals.

In testimony whereof I aiiix my signature in presence of two witnesses.

GEORGE F. ALBRECHT.

Witnesses:

CHAs. F. RANDALL, v ELLEN O. SPRING. 

